marc 21 as a metadata standard - 美国国会图书馆.ppt

July 6, 2000 MARCXML, MODS and Dublin Core MAVIS Users Conference 2003 Rebecca Guenther (rgue@) Library of Congress Overview of presentation Why MARC in XML MARCXML environment MODS Dublin Core Comparisons The MARC format Markup: data element set Semantics: meaning of elements (but content defined by other standards) Structure = syntax for communication 2709 MARCXML MARC 21: an international descriptive metadata format MARCXML evolution Need to take advantage of XML Establish standard MARC 21 in an XML structure Need simpler (but compatible) alternatives Development of MODS Need interoperability with different schemas Assemble coordinated set of tools Need continuity with current data Provide flexible transition options MARC in XML Why make transition to XML? To take advantage of emerging tools and systems that function through XML To make MARC compatible with new initiatives in the XML environment such as ZING (Z39.50 International Next Generation) OAI (Open Archives Initiative harvesting) METS (Metadata Encoding Transmission Schema) DC (use data from Dublin Core in MARC environment) ONIX (use data from ONIX in the MARC environment) MARC 21 (2709) record (machine view) 00967cam 2200277 a 4500 001000800000005001700008008004100025020005300229040001800282050002400312082002100336100003000357245007400387260004400461300003500505440001200540500002000552650004200572651002500614 347139419990429094819.1931129s1994 wauab 001 0 eng  a  a0898863872 (acid-free, recycled paper) :c$14.95 aDLCcDLCcDLC 00aGV1046.G3bG47 199400a796.6/4/09432201 aSlavinski, Nadine,d1968-10aGermany by bike :b20 tours geared for discovery /cNadine Slavinski. aSeattle, Wash. :bMountaineers,cc1994. a238 p. :bill., maps ;c22 cm. 0aBy bike aIncludes index. 0aBicycle touringzGermanyxGuidebooks. MARC 21 in XML – MARCXML MARCXML record XML exact equivalent of MARC (2709) record Lossless/roundt